fix: when logger queue is full exit quickly upon doneCh (#14928)

Additionally only reload requested sub-system not everything

cmd/admin-handlers-config-kv.go

@@ -104,7 +104,7 @@ func applyDynamic(ctx context.Context, objectAPI ObjectLayer, cfg config.Config,
 		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
 		return
 	}
-	globalNotificationSys.SignalService(serviceReloadDynamic)
+	globalNotificationSys.SignalConfigReload(subSys)
 	// Tell the client that dynamic config was applied.
 	w.Header().Set(madmin.ConfigAppliedHeader, madmin.ConfigAppliedTrue)
 }

cmd/notification.go

@@ -414,6 +414,21 @@ func (sys *NotificationSys) ServerUpdate(ctx context.Context, u *url.URL, sha256
 	return ng.Wait()
 }
 
+// SignalConfigReload reloads requested sub-system on a remote peer dynamically.
+func (sys *NotificationSys) SignalConfigReload(subSys string) []NotificationPeerErr {
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
+		client := client
+		ng.Go(GlobalContext, func() error {
+			return client.SignalService(serviceReloadDynamic, subSys)
+		}, idx, *client.host)
+	}
+	return ng.Wait()
+}
+
 // SignalService - calls signal service RPC call on all peers.
 func (sys *NotificationSys) SignalService(sig serviceSignal) []NotificationPeerErr {
 	ng := WithNPeers(len(sys.peerClients))
@@ -423,7 +438,7 @@ func (sys *NotificationSys) SignalService(sig serviceSignal) []NotificationPeerE
 		}
 		client := client
 		ng.Go(GlobalContext, func() error {
-			return client.SignalService(sig)
+			return client.SignalService(sig, "")
 		}, idx, *client.host)
 	}
 	return ng.Wait()
@@ -1541,7 +1556,7 @@ func (sys *NotificationSys) ServiceFreeze(ctx context.Context, freeze bool) []No
 		}
 		client := client
 		ng.Go(GlobalContext, func() error {
-			return client.SignalService(serviceSig)
+			return client.SignalService(serviceSig, "")
 		}, idx, *client.host)
 	}
 	nerrs := ng.Wait()

cmd/peer-rest-client.go

@@ -688,9 +688,10 @@ func (client *peerRESTClient) ServerUpdate(ctx context.Context, u *url.URL, sha2
 }
 
 // SignalService - sends signal to peer nodes.
-func (client *peerRESTClient) SignalService(sig serviceSignal) error {
+func (client *peerRESTClient) SignalService(sig serviceSignal, subSys string) error {
 	values := make(url.Values)
 	values.Set(peerRESTSignal, strconv.Itoa(int(sig)))
+	values.Set(peerRESTSubSys, subSys)
 	respBody, err := client.call(peerRESTMethodSignalService, values, nil, -1)
 	if err != nil {
 		return err

cmd/peer-rest-common.go

@@ -84,6 +84,7 @@ const (
 	peerRESTUserOrGroup    = "user-or-group"
 	peerRESTIsGroup        = "is-group"
 	peerRESTSignal         = "signal"
+	peerRESTSubSys         = "sub-sys"
 	peerRESTProfiler       = "profiler"
 	peerRESTTraceErr       = "err"
 	peerRESTTraceInternal  = "internal"

cmd/peer-rest-server.go

@@ -837,7 +837,14 @@ func (s *peerRESTServer) SignalServiceHandler(w http.ResponseWriter, r *http.Req
 			s.writeErrorResponse(w, err)
 			return
 		}
-		if err = applyDynamicConfig(r.Context(), objAPI, srvCfg); err != nil {
+		subSys := r.Form.Get(peerRESTSubSys)
+		// Apply dynamic values.
+		if subSys == "" {
+			err = applyDynamicConfig(r.Context(), objAPI, srvCfg)
+		} else {
+			err = applyDynamicConfigForSubSys(r.Context(), objAPI, srvCfg, subSys)
+		}
+		if err != nil {
 			s.writeErrorResponse(w, err)
 		}
 		return